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Hydrophobic amorphous alloy coating and preparation method thereof

A technology of amorphous alloys and iron-based amorphous alloys, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of non-durable hydrophobicity, poor matrix bonding force, and low mechanical strength, and achieve Low cost, excellent corrosion resistance, good fluidity

Inactive Publication Date: 2011-05-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hydrophobic amorphous alloy coating, which solves the problems of low mechanical strength, poor bonding with the substrate, and non-permanent hydrophobicity of organic polymer hydrophobic coatings.

Method used

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  • Hydrophobic amorphous alloy coating and preparation method thereof
  • Hydrophobic amorphous alloy coating and preparation method thereof
  • Hydrophobic amorphous alloy coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] When preparing:

[0033] (1) First, the master alloy is prepared by vacuum induction melting according to the above-mentioned required components, and then the master alloy is put into the atomization furnace, and the amorphous alloy powder is prepared by the gas atomization technology.

[0034] (2) Afterwards, the amorphous alloy powder with a particle size distribution of 45-55 μm is selected, and the powder particle morphology is as follows figure 1 a, Most of the powders are nearly spherical and have good fluidity, which is suitable as a precursor powder for thermal spraying. X-ray diffraction patterns of amorphous alloy powder and its coating figure 2 As shown in a, it can be seen from the figure that both the powder and the prepared coating are amorphous. We further examined the structure of the iron-based amorphous alloy coating with a transmission electron microscope (TEM), such as figure 2 As shown in b, the bright field image of the coated sample has no o...

Embodiment 2

[0044] The difference from Example 1 is:

[0045] The particle size of the amorphous powder used in this example ranges from 33 to 45 μm; the specific spraying parameters of the supersonic flame spraying kerosene flow rate is 16L / h; the obtained coating is completely amorphous, and the surface morphology of the coating is mostly unmelted or semi-molten particles. Its contact angle is image 3 As shown in c, the static contact angle of the amorphous alloy coating in this example is 122°, indicating that the coating has good hydrophobic properties. The corrosion resistance of the coating is better than that of 316 stainless steel.

Embodiment 3

[0047] The difference from Example 1 is:

[0048] The particle size of the amorphous powder used in this example ranges from 20 to 33 μm; the specific spraying parameters of supersonic flame spraying are kerosene flow rate of 14L / h; the obtained coating is completely amorphous, and its contact angle is as follows: image 3 As shown in b, the static contact angle of the amorphous alloy coating in this example is 92°, indicating that the coating has good hydrophobic properties. The corrosion resistance of the coating is better than that of 316 stainless steel.

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Abstract

The invention discloses a hydrophobic amorphous alloy coating which is prepared by taking Fe-based amorphous alloy powder as a raw material and adopting a supersonic flame spraying technique. The Fe-based amorphous alloy powder is composed of the following elements and inevitable impurities: 10.0-17.0% of Cr, 12.0-20.0% of Mo, 4.0-8.0% of B, 10.0-18.0% of C, 0.0-5.0% of Y and balance of Fe. The invention also discloses a preparation method of the coating. The amorphous alloy coating obtained by the invention not only has better lyophobic property, but also has better corrosion resistance, and high hardness and binding strength, thus having great application prospect on the facilities in the fields of underwater drag reduction, pollution prevention of ship shells, scale prevention on four walls of a boiler, hydraulic power and oil-gas field development and the like.

Description

Technical field: [0001] The invention relates to a hydrophobic amorphous alloy coating, a technical method for preparing the amorphous alloy coating, and an idea of ​​making the excellent performance of the amorphous alloy coating be applied in industry. Background technique: [0002] Hydrophobic coatings are widely used in daily life, high-tech industry, and military affairs. In recent years, people have paid more and more attention to the research and development of hydrophobicity on the surface of materials. Many superhydrophobic coatings (static contact angle greater than 150 °). However, these coatings are all organic polymer coatings. They have low mechanical strength and poor binding force with the substrate. Their hydrophobic properties will be weakened or even disappeared due to the accumulation of impurities during long-term use. At the same time, some preparation processes are complicated and expensive. , limiting its scope of application. Therefore, it is of gr...

Claims

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Application Information

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IPC IPC(8): C23C4/06C23C4/129
Inventor 柳林张诚谌祺李宁
Owner HUAZHONG UNIV OF SCI & TECH
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